Plant cells and animal cells: how they are alike and different
Grade 7 Science Worksheet
Circle the best answer.
It has no chloroplasts. Ari reads a cell card. Which conclusion is right?
- An animal cell, because it has no chloroplasts
- A plant cell, but it cannot release energy from sugar without chloroplasts
- A plant cell, because it has a cell wall and a large central vacuole
- An animal cell, because roots grow underground
Esme reads a cell card. Which conclusion is right?
- A plant cell, because it has a cell wall instead of a membrane
- Hard to say, because moss has no flowers
- A plant cell, because it has a cell wall and chloroplasts
- An animal cell, because it has mitochondria
Read this first
Microscope card (read about; the teacher prepared the slide)
Onion skin, stained. Boxy cells in neat rows, a thick line around each cell, one dark dot in each cell, no green parts. Not to scale.
Jun’s teacher shows a prepared slide through a microscope. Why are no green parts seen?
- The stain hides the chloroplasts from view under the microscope
- Onion skin cells are animal cells
- These bulb cells get no light, so they have no chloroplasts
- The thick cell walls block the green color
Microscope card (read about; the teacher prepared the slide)
Cheek cells, stained blue. Flat cells with uneven, rounded edges, one dark dot in each cell, no thick outer line. Not to scale.
Kira’s teacher shows a prepared slide through a microscope. Why do these cells have uneven, rounded shapes?
- They have a flexible membrane and no stiff cell wall
- They are not true cells, because they have no cell wall
- They have a soft cell wall that bends
- They have no edge around the cytoplasm
Microscope card (read about; the teacher prepared the slide): a leaf of a water plant. Not to scale. Luz’s teacher shows a prepared slide through a microscope. Which two parts seen here show these are plant cells?
- The cell walls, which replace the membranes
- The cell walls and the chloroplasts
- The mitochondria and the nucleus
- The cell membrane and the cytoplasm
Noah drew an animal cell and left out one part. Which part is missing?
- Chloroplasts
- A nucleus
- A stiff wall to hold its shape
- A cell wall around the outside
Cell wall, cytoplasm, nucleus, mitochondria, chloroplasts, large central vacuole. Pia drew a typical leaf cell and left out one part. Which part is missing?
- Nothing: the cell wall does the membrane’s job
- A cell membrane just inside the cell wall
- A second nucleus
- Nothing: membranes belong in animal cells, not plant cells
Cell theory card
(1) All living things are made of one or more cells. (2) The cell is the basic living unit. (3) New cells come only from cells that already exist. Growth table (example data): Day 1, root 2 cm; Day 3, root 4 cm; Day 5, root 7 cm.
Ren measures a bean seedling’s root, which grows longer each day. Where do the new root cells come from?
- Water in the root turns into cells
- Existing root cells divide to make new ones
- The old cells stretch longer; no new cells form
- The soil turns into new root cells
Cell theory card
(1) All living things are made of one or more cells. (2) The cell is the basic living unit. (3) New cells come only from cells that already exist. Note: the pond water holds a living thing made of just one cell.
Tala’s class reads about a pond water sample. Which statement fits cell theory?
- It is too small to be alive, so it is not considered a living thing
- It formed from pond water and mud
- It is alive, and its one cell does all of its life processes
- It is alive, but it is not made of cells
Cell theory card
(1) All living things are made of one or more cells. (2) The cell is the basic living unit. (3) New cells come only from cells that already exist.
Zee reads that a tadpole grows into a frog with many more cells. Where did the extra cells come from?
- From the pond water it swims in
- From its existing cells dividing again and again
- Frogs are made of cells, but tadpoles are not
- From its food turning straight into new cells